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- Grade Range
- 9th
- Rating
Students explain the meaning of sine, cosine, and tangent ratios in right triangles. They demonstrate the use of trigonometric ratios in solving right triangles and calculate an unknown side or an unknown angle in a right triangle. Full Review »
- Grade Range
- 9th - 12th
- Rating
Students examine and discuss techniques using trigonometric ratios for right triangles. They observe examples of trigonometric ratios, discuss alternative methods for checking their results, and complete a worksheet. Full Review »
- Grade Range
- 10th - 12th
- Rating
Students draw right triangles and measure the legs and hypotenuse of each, They use their measurements to compare ratios of each side to every other side. Students use these results to write paragraphs explaining what they concluded from the activity. Students are introduced to the mnemonic device "Sohcahtoa." Full Review »
- Grade Range
- 9th
- Rating
Students create clinometers using a protractor, weight, and string. They work in pairs to practice sighting objects above or below their line of sight. Students use ratios of right triangles to determine the height of a predetermined object. Full Review »
- Grade Range
- 9th - 12th
- Rating
Students are introduced to the basic trigonometric identities. Using a diagram, they discover why the parts of the unit circle as named as they are and use equations to finalize the Pythagorean trigonometric identities. They also review basic algrebra terminology that could be useful in the present. Full Review »
- Grade Range
- 9th - 12th
- Rating
Students use trigonometric ratios to determine the heights of tall structures. They convert their calculations for standard to metric units using an Internet site. Full Review »
- Grade Range
- 9th
- Rating
Students find the height of an object that would be difficult or impossible to measure directly. They construct and use a Clinometer to measure the angle of elevation (or depression). Students create a sketch of the measurement situation using a right triangle, indicate relevant points in the physical situation, and use basic trigonometric ratios to calculate the desired lengths. Full Review »
- Grade Range
- 7th
- Rating
Students study the vocabulary necessary to work with trigonometric functions as they solve problems with unknown sides and angles. They complete guided practice in the use of the Pythagorean Theorem, cosines, and tangents. At the end, they complete independent student practice. Full Review »
- Grade Range
- 7th
- Rating
Students solve problems involving unknown sides and angles using trigonometric functions and the Pythagorean Theorem. They define key vocabulary terms, follow step-by-step examples modeled by the teacher, and independently complete a worksheet. Full Review »
- Grade Range
- 8th
- Rating
Students use trigonometric functions to solve a variety of problems involving unknown sides and angles. They define key vocabulary terms, and observe the teacher solve example problems. Students then independently complete a worksheet. Full Review »
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